Checkline DFX-7 - Manual (Page 116)

Dakota Ultrasonics
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3) Use the LEFT and RIGHT arrow keys to toggle the ALARM on/off/audible.
4) Continue on to the next section “Setting the Alarm Low Limit”.
Setting the Alarm Low Limit
1) Assuming the ALARM is ON, use the UP and DOWN arrow keys to scroll
through the sub menu items until ALARM LOW is highlighted.
2) Press the LEFT and RIGHT arrow keys to scroll the value. When the
correct alarm value is being displayed, proceed to step 7.